WO2000027302A1 - Porte-empreinte dentaire et matiere a empreinte a utiliser avec celui-ci - Google Patents

Porte-empreinte dentaire et matiere a empreinte a utiliser avec celui-ci Download PDF

Info

Publication number
WO2000027302A1
WO2000027302A1 PCT/EP1999/008425 EP9908425W WO0027302A1 WO 2000027302 A1 WO2000027302 A1 WO 2000027302A1 EP 9908425 W EP9908425 W EP 9908425W WO 0027302 A1 WO0027302 A1 WO 0027302A1
Authority
WO
WIPO (PCT)
Prior art keywords
impression
impression tray
tray according
foam material
deflector
Prior art date
Application number
PCT/EP1999/008425
Other languages
German (de)
English (en)
Inventor
Rainer Hahn
Original Assignee
Dürr Dental GmbH & Co. KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dürr Dental GmbH & Co. KG filed Critical Dürr Dental GmbH & Co. KG
Priority to EP99971688A priority Critical patent/EP1128779B1/fr
Priority to AT99971688T priority patent/ATE287671T1/de
Priority to DE59911531T priority patent/DE59911531D1/de
Priority to AU13788/00A priority patent/AU1378800A/en
Publication of WO2000027302A1 publication Critical patent/WO2000027302A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C9/00—Impression cups, i.e. impression trays; Impression methods
    • A61C9/0006—Impression trays
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K6/00—Preparations for dentistry
    • A61K6/90—Compositions for taking dental impressions
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S528/00—Synthetic resins or natural rubbers -- part of the class 520 series
    • Y10S528/901—Room temperature curable silicon-containing polymer

Definitions

  • the invention relates to a dental impression tray according to the preamble of claim 1 and an impression material for use with such an according to claim 35.
  • an impression tray which has an essentially U-shaped groove, which is delimited by a bottom wall and two walls running in the circumferential direction, is filled with an impression material outside the patient's mouth.
  • the impression tray is then placed on the row of teeth to be molded, the impression material being displaced from the teeth, so that a negative image of the row of teeth is obtained after the impression material has hardened.
  • impressions obtained in this way often have defects that can be traced back to trapped liquids (sulcus fluid, blood, etc.) or air bubbles, poor wetting, warping or elastic resetting after deformation of the plastic impression material and its hardening under contact pressure.
  • deflector elements are arranged in the mold channel delimited by the tray walls, which deflect the impression material in such a way that it receives a component of the flow velocity that is parallel to the axis of the teeth. This favors a complete impression of undercut and deep areas.
  • Deflector elements as specified in claim 2, can be molded directly onto the impression tray during the manufacture thereof. Different geometries are conceivable, in particular dome-shaped, ramp-shaped or fish-scale-like geometry of the individual deflector elements.
  • a deflection part, as specified in claim 4, can be particularly easily by vacuum deformation a film or by spraying.
  • the development of the invention according to claim 7 makes it possible to cover different tooth sizes with only a single deflection material or a small number of different deflection materials, because if the deflector elements extend too far into the groove and come into contact with a tooth, deformation of the corresponding deflection elements.
  • the deformed deflector elements do not affect the quality of the impression. They are built into the impression in the deformed state, whereby even if the deflector elements are partially on the surface, a smooth surface is achieved so that there is only an optical, but not a functional, irregularity.
  • Deflector elements as specified in claim 8, are distinguished by a particularly simple geometry and thus simple manufacture.
  • Open-pore foam materials are commercially available as sheet material with different pore density (and thus pore size), different wall thickness and made from different materials. You only need to be provided with the required edge contour using a cutting tool.
  • an open-pore foam material is to be understood as meaning one in which neighboring pores are connected in terms of flow.
  • the term open-pore foam material is not intended to specify how these connections are created between the individual pores.
  • this term is not intended to be limited to those materials which are obtained by subsequently destroying pore walls of an inherently closed-pore material (e.g. by rolling or other mechanical processing).
  • skeletal foams represent a special subset of the open-pore foam materials.
  • Foam materials as specified in claim 11 (skeletal foams), have a high deflecting capacity when the impression material flow is not restricted too much.
  • Preferred pore densities or mesh sizes of the open-pore foam materials are (expressed via the pore density) in claims 12 and 13.
  • the claims 14 and 15 indicate relationships between the pore size and the wall thickness of the open-pore foam material or the skeletal foam material.
  • the organic foam materials and inorganic foam materials specified in claim 16 and 17 are preferred, also because common impression materials can form a good bond with these foam materials.
  • the development of the invention according to claim 18 ensures a high yield in the production of the foam material layers starting from block-shaped intermediate products.
  • a part of the mold channel can be blocked for the impression material, so that the latter inevitably flows closer to the teeth. This also saves on expensive impression material.
  • the impression is given a cross-sectional profile which ensures sufficient mechanical strength of the finished impression, e.g. a U-profile cross section.
  • a rough distribution of the impression material can be carried out through the base layer, which works without great throttling of the non-deflected part of the impression material flow, and the open-pore top layer can ensure the essentially homogeneous delivery of the impression material through the deflection part, in particular, if the base layer has larger pores than the one it supports Foam material layer (claim 22).
  • the deflection part touches (if necessary only partially) the teeth to be molded
  • the deflection elements are so far designed as to be wettable by the impression material.
  • the deflector elements can be used in addition to the wetting of the tooth surfaces by the impression material. Small menisci form between the deflector elements and the impression material and the tooth surfaces, which favor the wetting of the tooth surfaces by the impression material.
  • a detachable connection between the feed part and the spoon base part can thereby be ensured in a simple manner.
  • the development of the invention according to claim 29 allows a bubble-free molding of a complete jaw up to the front end.
  • Claim 30 ensures that even with asymmetrical flow conditions in the two legs of the impression tray, residual air is drawn off until the impression tray is completely filled, so that the impression is consistently free of inclusions.
  • the development of the invention according to claim 31 is advantageous with regard to a simple detachable connection of the vacuum connection part to the spoon base part. This is particularly advantageous if the vacuum connection part is a disposable part that has been used once. The elaborate cleaning of the vacuum connection part for reuse can then be omitted.
  • a double sealing lip arrangement according to claim 34 ensures an even more secure seal at problem areas.
  • Claim 36 gives a preferred association between the viscosity of the impression material and the pore or mesh size of the deflection part.
  • the impression material is not or only slightly thixotropic.
  • Thixotropic materials would require very high forces to move the impression material through the deflection part.
  • the wetting of the tooth surface by thixotropic impression materials is less favorable.
  • An impression tray as specified in claims 1 to 33, can also be used according to claim 38 for therapeutic purposes.
  • the viscous working mass serves as a vehicle that can be used to bring the active substances to deep recesses, in gum pockets, in occlusal reliefs and similar areas of the patient's jaw that are difficult to access.
  • the vehicle for the medicinal active ingredients can have largely similar properties to an impression material, so that the molding of teeth and the transport of active ingredients to the teeth and gums can be done in one operation.
  • Preferred active ingredients are specified in claim 39.
  • Figure 1 is a perspective view of an impression tray for the upper jaw of a patient seen from behind and above;
  • Figure 2 is a perspective view of the impression tray of Figure 1 seen from above and in front;
  • Figure 3 a plan view of the impression tray according to Figures 1 and 2;
  • FIG. 4 shows a section through the impression tray according to FIGS. 1 to 3 along the angled-curved section line IV-IV of FIG. 3;
  • FIG. 5 a top view of a section of a deflector part which can be used together with an impression tray according to FIGS. 1 to 4;
  • Figure 6 shows a section through the deflector element shown in Figure 5 along the section line VI-VI;
  • FIG. 7 a plan view of a section of a modified deflector element, which can also be used in connection with an impression tray according to FIGS. 1 to 4;
  • FIG. 8 a section through the deflector element shown in FIG. 7 along the section line VIII-VIII there;
  • FIG. 9 a transverse section through an impression tray, which is constructed similarly to the impression tray according to FIGS. 1 to 4, but is used to produce impressions of the lower jaw, shown immediately after positioning on the lower jaw;
  • FIG. 10 shows a view similar to FIG. 9, in which an intermediate state is shown when the cavity formed between the impression tray and the lower jaw is filled with an impression material;
  • FIG. 11 a view similar to FIG. 10, but with the space between the impression tray and the lower jaw now being completely filled with impression material;
  • FIG. 12 a transverse section through the impression tray and the impression remaining in it after removal from the lower jaw;
  • FIG. 13 a view similar to FIG. 9, but using a deflector part with a low height using the example of a lower jaw section;
  • Figure 14 a longitudinal section through a similar impression tray as shown in Figure 13, but after positioning on the upper jaw of a patient;
  • Figure 15 a view similar to Figure 14, wherein however, a deflector part which is arranged in the impression tray is additionally provided with a sealing section;
  • FIG. 16 a view similar to FIG. 15, but with the impression tray partially filled with impression material;
  • FIG. 17 a view similar to FIG. 16, but with the impression tray already filled with impression material before positioning on the upper jaw;
  • FIG. 18 a section through a modified composite deflection part which runs perpendicular to the main plane of the deflection part;
  • Figure 19 a view similar to Figure 18, but showing a modified composite material.
  • an impression tray is designated by 10 in total. It comprises a base part, designated overall by 12, which comprises a circumferential wall 14 curved in the manner of a horseshoe and a base wall 16 which is also similar to a horseshoe.
  • a palate wall 18 is formed on the inner edge of the bottom wall 16, which roughly speaking has the shape of a quarter ellipsoid.
  • an inner peripheral wall 20 would be provided instead of the palate wall 18, which is only indicated by dashed lines in FIG. 1.
  • the base part 12 delimits a horseshoe-shaped channel 21.
  • the peripheral wall 14 In its front, proximal section, the peripheral wall 14 is provided with a plurality of vacuum openings 26, which are arranged in a regular pattern.
  • the edge contour of the area of the peripheral wall 14 provided with vacuum openings 26 is essentially a rectangle.
  • a vacuum connection part, generally designated 28 is clipped onto the front section of the peripheral wall 14 with the interposition of a flat seal 30.
  • the vacuum connection part 28 has an Easis section 32 which is curved in accordance with the curvature of the peripheral wall 14 and on which two resilient holding sections 34 are provided on the side, which are provided with latching means (not shown in more detail) which are provided with fastening pins 36 carried by the front of the peripheral wall 14 to form a latching connection work together.
  • the base section 32 On its outside, the base section 32 carries a connection piece 38, the bore of which is led through the base section 32, so that the connection piece 38 is connected to the interior of the base body 26 via the vacuum openings 26.
  • Fluid flow braking elements are arranged between the bores on the outside of the impression tray and / or the inside of the vacuum connection part, which prematurely closes bores that are still open prevent holes already filled in the vicinity.
  • Such braking elements can also be fine-pored structural foam elements. The latter can protrude slightly over the edge of the vacuum connection part or can be partially covered with a closed skin and thus simultaneously take on a sealing function by pressing together between the vacuum connection part and the spoon base part.
  • An impression material feed part 40 is detachably placed on the underside of the bottom wall 16.
  • This includes a circumferential wall 42 which extends perpendicular to the main plane of the feed part 40 and which is curved in accordance with the circumferential wall 14, and an inner circumferential wall 44 parallel to the latter and a bottom wall 46.
  • a front portion of the peripheral wall 42 carries an impression material feed port 48.
  • the bottom wall 46 approaches the bottom wall 16 of the base part 12 with increasing distance from the feed connector 48.
  • the bottom wall 16 of the base part 12 thus delimits, together with the feed part 40, an impression material feed channel 50, the cross section of which decreases towards the rear end of the two legs of the feed part 40.
  • the rear ends of the two legs of the horseshoe-shaped or U-shaped feed channel 50 are connected to the interior of the base part 12 via connection openings 60 provided there at the rear ends of the bottom wall 16 in a direction transverse to the direction of flow.
  • one edge wall 62 of the connection opening 60 is chamfered towards the rear section of the peripheral wall 16. That way Impression material, which is fed to the feed nozzle 48, is guided to the rear end of the horseshoe-shaped base part 12 without a major change in direction.
  • the rear ends of the feed part each have a locking arm 64 which cooperates with a suitable locking recess 66 in the rear section of the peripheral wall 14.
  • a locking arm 68 which is carried by the peripheral wall 40 and which cooperates with a matching locking arm 70, which is supported by the underside of the bottom wall 16, is used to fix the front section of the food part 40.
  • a sealing part made of elastomeric material is arranged on the upper edge of the circumferential wall 14.
  • the latter has an upper horizontal profile section 74 which overlaps the upper side of the peripheral wall 14 and a second profile section 76 with a U-shaped cross section which overlaps the outside of the upper end of the peripheral wall 14.
  • sealing lips 78, 80 are formed on the first profile section 74, which are V-shaped (opening angle of the V approximately 50).
  • the sealing lips 78, 80 serve to seal the impression tray 10 against the soft palate.
  • the deflector part 24 has edge contours that those of
  • the deflector part 24 is made of a skeletal foam material manufactured. As can be seen from the enlarged detail in FIG. 1, such a material has a structure similar to that of a three-dimensional knitted fabric. A closer look reveals individual thread-like skeletal branches 82 which are shaped such that they form meshes or pores 84.
  • a skeletal foam material is obtained by reticulating and carbonizing a polyurethane foam material in a controlled manner. The pore walls of this foam material then contract onto the thread-like skeletal branches 82.
  • Such a skeleton foam material represents macroscopically a flow resistance for a liquid material, the size of which can be adjusted via the size of the meshes or pores 84 and the thickness of the thread-like skeletal branches 82.
  • the various thread-like skeletal branches 82 represent microscopic points of view for the liquid flow, which can deflect a liquid flow originally running in a first direction in different directions.
  • an impression tray as explained above with reference to FIGS. 1 to 4, is used as follows (details are described in more detail below):
  • the vacuum connection part 28 is connected to a vacuum source, the feed part 40 to a source for liquid impression material. Initially, the flow connection between the feed line 40 and the impression material source remains closed.
  • the impression tray 10 After placing the impression tray 10 on the upper jaw, the impression tray 10 sucks on the gums and the Palate plate firm. After opening the flow connection between the feed part 40 and the impression material source, liquid impression material flows to the connection openings 60 provided at the rear in the base part 12.
  • the molding space located between the upper jaw and the impression tray 10 is thus increasingly filled from behind with impression material, air being constantly sucked in from the impression tray 10 via the vacuum connection part 28 until the entire molding space is filled without bubbles.
  • the vacuum connection part can also be operated without connection to a vacuum pump. In this case it is only used for ventilation.
  • the filling process is ended. This can be done automatically by providing a filter plug in or behind the connecting piece 38, which is permeable to air but not to the higher viscosity impression material.
  • the movement component of the liquid impression material directed perpendicular to the bottom wall 16 is important in order to ensure that the undercut gaps between successive teeth and in the transition area between the tooth crown and tooth neck, edge to get a clean and precise impression.
  • Skeleton branches 82 so that overall a "scattering" of the impression material into the different solid angles is obtained which is on average uniform.
  • the skeletal foam material thus acts like a matt screen for light for the impression material. In this way, shadows in the impression obtained are avoided.
  • deflector part made of skeletal foam material described above, one can also use a deflector part 24, as is partially shown in FIGS.
  • Such a deflector part can also be used together with an additional other deflector part, e.g. a skeletal foam.
  • a base wall 86 carries a multiplicity of scale-like deflector ramps 88 which are arranged in rows in the exemplary embodiment shown here.
  • the deflector ramps 88 of adjacent rows are each offset by half a division.
  • the height of the deflector ramps 88 can, if desired, vary in the direction of flow (arrow 90), e.g. as the distance from the vacuum connection part 28 decreases, in order to obtain an increased deflection effect there.
  • the base wall 86 can additionally be provided with openings in the areas free from deflector ramps 88, as indicated by dashed lines at 92, which form further scattering centers for impression material.
  • the deflector ramps 88 can also be moderately high, as they can easily be deformed by the tips of a tooth.
  • the further modified deflector element material which is shown in FIGS. 7 and 8, has a base wall 94 which carries curved deflector wire nets 96.
  • the wire nets 96 each allow part of the incoming impression material to pass through and deflect another part of this material towards the teeth.
  • the proportion of the deflected impression material can be specified via the mesh size and the diameter of the individual wires.
  • a “high” deflector part is to be understood as one that is deformed by at least one tooth when the impression tray is placed on the jaw.
  • a “lower” deflector part is to be understood as one whose upper side is at a distance from the teeth at all points after the impression tray has been positioned on the jaw. In a typical "lower” deflector part, however, the distance between the top of the deflector part and the teeth must not be very large. In practice, this distance should not exceed 1 to 2 mm.
  • FIG. 9 shows a part of a total of 100 reproduced lower jaw. You can see the jawbone at 102 and the gums at 104.
  • a tooth is generally designated by 106, it has a crown 108 and a root 110.
  • a gum pocket 112 is delimited by the upper region of the tooth root 110 and the gums 104 and widens upwards in a wedge shape.
  • a precise impression is necessary if crowns or bridges are to be made from the impression. Otherwise, it is precisely in this critical area that the restoration part adapts poorly to the prepared tooth, with the consequence that the restoration part sits poorly and bacteria can penetrate through gaps between the restoration part and the prepared tooth surface.
  • FIG. 10 shows the situation in which the interior of the impression tray is partially filled with impression material 114.
  • Hinting is exaggerated for clarification, since the flow of the impression material has a constant basic component, which is directed from the connection openings 60 to the vacuum connection part 28.
  • FIG. 12 shows the state after the space between the impression tray 10 and the lower jaw 100 has been completely filled with impression material 114.
  • FIG. 11 shows the impression tray 10 with finished impression 116 after removal of the impression tray 10 from the lower jaw 100 (and turning the impression tray over).
  • FIG. 13 shows an impression tray 10 in which a lower deflector part 24 is inserted.
  • the space between the impression tray 10 and an upper jaw 118 is filled with impression material in a manner similar to that described above for FIGS. 9 to 11, with the proviso that the deflector part 24 is spaced from the end faces of the teeth everywhere, so that the different speed components of the partial streams emerging from the meshes or pores 84 have somewhat equalized before the material hits the teeth, and therefore the additional speed component for the different partial beams is directed essentially parallel to the longitudinal axis of the tooth 106.
  • FIG. 14 shows a modified impression tray 10 for taking an upper jaw.
  • the sealing part 72 is omitted.
  • the upper end of the peripheral wall 14 is crowned so that it can work directly with the gums.
  • a plastically deformable sealing material 120 is provided, which was applied to the rear section of the peripheral wall 14 before application of the impression tray 10.
  • a lower deflector part 24 is used, this being contoured in the proximal / distal direction so that the free surface of the deflector element 24 is at a substantially constant distance from the tooth tips.
  • the deflector part 24 according to FIG. 15 has an integrally formed sealing section 122.
  • the sealing section 122 is made impermeable to liquid by an applied skin 124, so that the material of the deflector part 24 can also serve as a flexible, impermeable sealing material.
  • FIG. 16 shows the exemplary embodiment according to FIG. 14 in an intermediate state of the filling of the mold space delimited between the impression tray 10 and the upper jaw 118.
  • the legs of the impression tray 10 are already partially filled from behind by impression material 114, as indicated by hatching.
  • the direction of the hatching should at the same time reflect the direction of those partial material flows which emerge from the upper side of the deflector part 24.
  • connection openings 60 The supply of impression material to the connection openings 60 takes place through hoses 126 running directly to the connection openings 60, the second ends of which are connected to the impression material source, and the vacuum is applied to the front section of the impression tray 10 by means of a further hose 128 which is connected to the vacuum source connected is.
  • the tube 128 can simply communicate with the atmosphere. It then only serves to vent the molding space delimited by the impression tray 10 and the patient's jaw.
  • impression tray 10 provided with the deflector part 24 is filled with impression material 114 before it is placed on the upper jaw.
  • part of the impression material in impression tray 10 is displaced to the outside, as indicated at 130 and 132, respectively.
  • the deflector part 24 is useful, since it ensures that an impression material is not simply moved inside the tray parallel to the bottom wall 16 of the impression tray, but rather that movement components perpendicular to the bottom wall 16 are produced, as a result of which clean impressions, even of deep incisions, are produced Cavities and in the transition area between the tooth crown and tooth root is obtained, as well as in the embodiments described above.
  • deflector parts which consist entirely of skeletal foam material
  • composite deflector parts as have now been described with reference to FIGS. 18 and 19.
  • the deflector part material according to FIG. 18 has a lower base layer 134 which is impermeable to flow (pore-free solid material or closed-pore material).
  • a deflector layer 136 which consists of an open-pore material, as described above, or a multiplicity of discrete deflection elements sits on the base layer 134 (Deflector ramp, deflector grid) carries, analogous to the deflection part shown in Figure 5.
  • the base layer 134 serves on the one hand to reduce the amount of the impression material required. This not only saves costs, it also reduces the time required to fill the molding space. Finally, the flow rate of the impression material can also be set via the proportion of the height of the molding space which is taken up by the base layer 134.
  • an open-pore base layer 138 and an equally open-pore deflector layer 140 which e.g. can be formed by skeletal foam materials of different (usually smaller above) porosity.
  • an equally open-pore deflector layer 140 which e.g. can be formed by skeletal foam materials of different (usually smaller above) porosity.
  • impression tray itself: basic geometry of the base part, in particular height of the peripheral wall 14 above the bottom wall 16; Geometry and position of the connection openings 60; Location and distribution as well as geometry of the individual vacuum openings 26; Surface quality of the Inner surface of the base part 12.
  • deflector part size and position of non-flow-permeable sections (e.g. base layer 134); Geometry and position of flow-deflecting components; microscopic structure of the flow deflecting components; chemical nature of the material used and the resulting physical properties, in particular wettability by the impression material and mechanical strength and mechanical deformability; Elasticity; plastic deformability (especially with metal foams), fixation of the deflector part to the impression tray.
  • impression material chemical properties and resulting physical properties, in particular rheological properties; Thixotropy; Curing time; harmless to health.
  • pretreatment of teeth to be molded if necessary, pre-injection of particularly problematic impression areas with low-viscosity impression material; Amount of vacuum applied to the impression tray; Pressure and flow velocity of the supplied impression material.
  • the impression material is fed to the rearmost sections of the legs of the essentially U-shaped channel, which pass through the peripheral wall 14, the bottom wall 16 and the palate wall 18 or the peripheral wall 20 of the impression tray 10 is limited. Vacuum is applied to the vacuum connector 28. This results in a basic flow of the impression material from distal to proximal, the large number of vacuum openings 26 provided ensuring that, regardless of asymmetries in the material flow in the two legs of the impression spoon, residual air and liquid pushed away from the impression material are sucked out to the end.
  • An additionally provided texturing of the peripheral wall 14 and optionally the palate wall 18 or the peripheral wall 20 is useful in order to generate additional radial movement components in the impression material with respect to the tooth longitudinal axis.
  • the texturing of the inner surface of the impression tray can look similar to that described above with reference to FIGS. 5 and 6 or 7 and 8 for a deflector part.
  • the material for the impression tray is primarily a metal that withstands sterilization conditions or a correspondingly stable plastic
  • the deflector part has a section that is impermeable to liquid, the edge contour of the same and its height allow the flow rate of the impression material in the impression tray to vary locally.
  • the deflector part has discrete deflector sections, such as the deflector ramps 88, it can consist of any material that is easy to form and preferably plastically deformable, for example plastic, wax etc.
  • the flow deflection properties or the control properties result in detail from the geometry of the individual deflector elements and their arrangement.
  • Rough surfaces such as e.g. obtained by cutting a closed-pore foam material can serve as scattering centers for the impression material.
  • an open-pore foam material is used as the deflector material, not only open-pore foam materials made of plastic but also those made of ceramic material, metal or other inorganic materials are suitable for this.
  • the foam must be stable against the flow loads that arise in it when the impression material is pressed through, but should not have any appreciably higher stability, so that it can be easily deformed by pressing in a tooth (safety measure; the foam material can also be used for "high" deflector parts ).
  • an inorganic foam material is used that is brittle, this material should preferably only be used as a "lower” deflector part. When used as a "high” deflector part, dent-like teeth may appear when the teeth are pressed in
  • the impression tray would have to be removed from the patient's mouth again after a first insertion and the inside of the mouth and the foam material of loose fragments, e.g. by blowing, free.
  • the physical properties of the deflector material are of interest for the interaction with the impression material, in particular the wettability of the Material through the impression material. If the deflector material does not have the desired wettability (or non-wettability) from the impression material, it can be provided with a suitable coating.
  • pore density or pore size is 1 / pore density
  • polyurethane skeletal foam materials are preferred:
  • the total liquid scattering properties obtained depend not only on the pore size and the diameter of the skeletal branches, but also on the basic geometry of the deflector part, in particular on its edge contour and height.
  • the thickness of the deflector part 24 does not have two pore diameters falls below.
  • the practical usable thicknesses for deflector parts made of skeletal foam are in the range of 2 to 5 mm for "lower” deflector parts and in the range of 4 - 9 mm for "high” deflector parts.
  • Such prefabricated deflector parts with different pore densities and different heights are made available to the dentist so that he can use them to find the "low” or "high” material that is correct with regard to the respective dentition. If necessary, the user will use different deflector parts at different points in the impression or use several deflector parts one above the other (at least partially).
  • all common impression materials are suitable, in particular hydrocolloids, alginates, polyethers, plastics, gypsum, condensation-crosslinking silicones, addition-crosslinking silicones, etc. Of these, addition-crosslinking silicones are preferred.
  • impression materials have thixotropic properties. With regard to good flow, non-or only slightly thixotropic impression materials are preferred for the impression according to the invention.
  • the speed at which the impression material] is fed into the impression tray must be so great that no hardening has occurred until the material front has reached the vacuum connection part 28. On the other hand, the feeding should be so slow that the impression material has enough time to fill even narrow and undercut areas of the jaw.
  • a time period of 20 sec to 40 sec, preferably 30 sec, for completely emptying a commercially available double cartridge for about 50 ml of total impression material volume can serve as the basic value for the feed speed of the impression material. This basic value can then be modified downwards or upwards depending on the conditions that have been specifically found and on the deflector part that is used specifically.
  • the negative pressure value applied to the impression tray when filling with impression material can be between 100 and 350
  • the release of the active ingredient contained therein can be controlled and influenced in a targeted manner.
  • Dental impression tray with at least one peripheral wall (14, 18; 14, 20) and a bottom wall (16), these walls delimiting a form channel (21) which can accommodate at least part of a row of teeth (106), characterized in that a plurality of deflector elements (82; 88; 96) is arranged in the channel.
  • impression tray according to claim 1, characterized in that at least part of the deflector elements (82; 88;
  • 96 is carried by a peripheral wall (14, 20) or the bottom wall (16).
  • Impression tray according to claim 1 or 2 characterized in that at least part of the deflector elements (82; 88; 96) is arranged on a deflection part (24) inserted into the mold channel (21).
  • impression tray according to claim 3 characterized in that discrete deflector elements (88; 96) of one of the
  • Base wall (16) adjacent base wall (86; 94) of the deflection part (24) are worn.
  • impression tray characterized in that the deflector elements (88; 96) are arranged equidistantly in successive rows.
  • impression tray according to claim 5, characterized in that the deflector elements (88) successive rows offset by half a pitch

Abstract

Pour que la qualité d'empreintes dentaires soit augmentée, il est proposé que, dans la gouttière de moulage (21) d'un porte-empreinte (10) soit placée une mousse rigide (24) qui dévie partiellement de façon régulière, en direction des axes des dents dont on prend l'empreinte, le courant de matière à empreinte injecté par la partie arrière du porte-empreinte (10), lequel est déplacé à travers la gouttière de moulage, jusqu'à des ouvertures à vide (26) situées à l'extrémité avant de celle-ci.
PCT/EP1999/008425 1998-11-11 1999-11-03 Porte-empreinte dentaire et matiere a empreinte a utiliser avec celui-ci WO2000027302A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP99971688A EP1128779B1 (fr) 1998-11-11 1999-11-03 Porte-empreinte dentaire
AT99971688T ATE287671T1 (de) 1998-11-11 1999-11-03 Dentaler abformlöffel
DE59911531T DE59911531D1 (de) 1998-11-11 1999-11-03 Dentaler abformlöffel
AU13788/00A AU1378800A (en) 1998-11-11 1999-11-03 Dental impression tray and impression material for use with the same

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19852056A DE19852056A1 (de) 1998-11-11 1998-11-11 Dentaler Abformlöffel sowie Abformmaterial zur Verwendung mit einem solchen
DE19852056.5 1998-11-11

Publications (1)

Publication Number Publication Date
WO2000027302A1 true WO2000027302A1 (fr) 2000-05-18

Family

ID=7887458

Family Applications (2)

Application Number Title Priority Date Filing Date
PCT/EP1999/008425 WO2000027302A1 (fr) 1998-11-11 1999-11-03 Porte-empreinte dentaire et matiere a empreinte a utiliser avec celui-ci
PCT/EP1999/008663 WO2000027342A1 (fr) 1998-11-11 1999-11-11 Materiau d'empreinte

Family Applications After (1)

Application Number Title Priority Date Filing Date
PCT/EP1999/008663 WO2000027342A1 (fr) 1998-11-11 1999-11-11 Materiau d'empreinte

Country Status (6)

Country Link
US (1) US6599974B1 (fr)
EP (2) EP1128779B1 (fr)
AT (1) ATE287671T1 (fr)
AU (2) AU1378800A (fr)
DE (3) DE19852056A1 (fr)
WO (2) WO2000027302A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6875016B2 (en) 2002-03-25 2005-04-05 3M Espe, Ag Dental impression tray with impression material retainer

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19926728B4 (de) 1999-06-11 2011-08-18 3M Espe Ag, 82229 Verwendung von Trägermaterialien und diagnostisch nutzbaren Zusatzstoffen in Abbildungsverfahren für intraorale Diagnosezwecke
AU2001295451A1 (en) * 2000-08-07 2002-02-18 S And C Polymer Silicon- Und Composite-Spezialitaten Gmbh Adhesive silicon filling and fixing materials
DE10061195B4 (de) * 2000-12-08 2004-12-02 3M Espe Ag Verwendung von Abformmassen zur Herstellung von Behandlungsvorrichtungen
ATE548017T1 (de) * 2003-08-01 2012-03-15 Minnesota Mining Mfg Gmbh Automischbare kitt-abformmasse
US7902269B2 (en) * 2004-02-13 2011-03-08 Kettenbach Gmbh & Co. Kg Dental material based on alkoxysilyl-functional polyethers containing a salt of a strong base as catalyst
DE102005031201A1 (de) * 2005-07-01 2007-01-25 Kettenbach Gmbh & Co. Kg Zu formstabilen Formkörpern aushärtendes kondensationsvernetzendes Dentalmaterial
DE102006022880B4 (de) * 2006-05-15 2010-09-30 Kettenbach Gmbh & Co. Kg Mehrstufiges Verfahren zur Sterilisation von aushärtbaren, medizinischen Mehrkomponenten-Abformmaterialien
KR100722464B1 (ko) 2006-07-14 2007-05-28 주식회사 두산 패키징용 게터, 고활성 산화칼슘, 및 고활성 산화칼슘의제조방법
JP2010502792A (ja) * 2006-09-08 2010-01-28 コロプラスト アクティーゼルスカブ 架橋ポリアルキレンオキシドを含む二成分型シーラント
DE102010032328A1 (de) * 2010-07-20 2012-01-26 Medentic S.A. Lumineszente Abformmasse
WO2014104719A1 (fr) * 2012-12-26 2014-07-03 제일모직 주식회사 Composition de polysiloxane durcissable pour un instrument optique, matériau de conditionnement et instrument optique

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1517197A (en) * 1924-02-27 1924-11-25 Cuttitta Vincent Pad for dental impression trays
US2963786A (en) * 1957-04-15 1960-12-13 Charles C Browning Dental partial impression tray
US5370533A (en) * 1993-11-08 1994-12-06 Bushnell; Raymond B. Dental impression tray assembly and method of taking impressions
WO1997032536A1 (fr) 1996-03-06 1997-09-12 Rainer Hahn Dispositif pour realiser des empreintes dentaires et porte-empreinte a cet effet
US5722832A (en) * 1996-12-02 1998-03-03 White; Dennis J. Method and material for taking dental impressions

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3933656A1 (de) * 1989-10-09 1991-04-11 Basf Ag Verdunstungsarme polyesterharze
DE4122310A1 (de) * 1991-07-05 1993-01-07 Bayer Ag Transparentes material fuer dentale anwendungen
US5830951A (en) 1995-04-13 1998-11-03 Dentsply Detrey G.M.B.H. Polyvinylsiloxane impression material
JPH09255896A (ja) * 1996-03-26 1997-09-30 Nippon Paint Co Ltd 篩分けが容易な粉体塗料組成物
DE19711314A1 (de) 1997-03-18 1998-09-24 Wacker Chemie Gmbh Lagerstabile, permanent wasserbenetzbare Vulkanisate ergebende Polysiloxanmasse
DE19722989C1 (de) * 1997-05-25 1999-02-25 Rainer Dr Hahn Form zur Herstellung eines Zahnmodelles
DE19730515A1 (de) 1997-07-16 1999-01-21 Espe Dental Ag Abformmaterial auf Silikonbasis

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1517197A (en) * 1924-02-27 1924-11-25 Cuttitta Vincent Pad for dental impression trays
US2963786A (en) * 1957-04-15 1960-12-13 Charles C Browning Dental partial impression tray
US5370533A (en) * 1993-11-08 1994-12-06 Bushnell; Raymond B. Dental impression tray assembly and method of taking impressions
WO1997032536A1 (fr) 1996-03-06 1997-09-12 Rainer Hahn Dispositif pour realiser des empreintes dentaires et porte-empreinte a cet effet
US5722832A (en) * 1996-12-02 1998-03-03 White; Dennis J. Method and material for taking dental impressions

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6875016B2 (en) 2002-03-25 2005-04-05 3M Espe, Ag Dental impression tray with impression material retainer

Also Published As

Publication number Publication date
WO2000027342A1 (fr) 2000-05-18
AU1378800A (en) 2000-05-29
DE19852056A1 (de) 2000-05-18
DE59909972D1 (de) 2004-08-19
EP1128798A1 (fr) 2001-09-05
AU1858900A (en) 2000-05-29
EP1128798B1 (fr) 2004-07-14
DE59911531D1 (de) 2005-03-03
US6599974B1 (en) 2003-07-29
EP1128779B1 (fr) 2005-01-26
ATE287671T1 (de) 2005-02-15
EP1128779A1 (fr) 2001-09-05

Similar Documents

Publication Publication Date Title
EP0884981B1 (fr) Dispositif pour realiser des empreintes dentaires et porte-empreinte a cet effet
EP3457980B1 (fr) Dispositif de rétention ainsi que procédé pour sa fabrication
DE19654884C2 (de) Formkörper
EP1128779B1 (fr) Porte-empreinte dentaire
DE102010049377B4 (de) Abformlöffel
DE102006047054A1 (de) Patientenindividuelles Implantatlager
DE102013209171B4 (de) Vorrichtung und Verfahren zur in situ-Herstellung von artikulierenden Spacern
EP0565847B1 (fr) Dispositif pour la résection apicale
WO2005107632A2 (fr) Porte-empreinte
EP1523952B1 (fr) Elément de restauration dentaire
DE112012004270T5 (de) Implantat-Struktur
DE2455828C3 (de) Blattimplantat aus Metall zur Befestigung von Zahnprothesen
EP1603483B1 (fr) Procede de production d'une prothese dentaire et dent artificielle associee
EP3157460B1 (fr) Base de prothèse et procédé pour relier par liaison de matière au moins une dent artificielle à une base de prothèse
EP0957813A1 (fr) Materiau stratifie pour pieces d'appui pour protheses dentaires, pieces d'appui et procede de fabrication de celles-ci
DE102016107819B4 (de) Abformlöffel
EP0137219B1 (fr) Dispositif pour la prise d'empreintes pour prothèses dentaires
DE19608546C2 (de) Vorrichtung zum Herstellen von Zahnabdrücken
DE4232511C2 (de) Vorrichtung zur Implantation von künstlichen Zahnwurzeln
AT518107B1 (de) Zahnreinigungsvorrichtung
DE19750092C2 (de) Abdrucklöffel zum Herstellen eines Abdruckes von einem menschlichen Kiefer
DE19801531C2 (de) Abdrucklöffel
DE4116190A1 (de) Abformloeffel zum herstellen von zahnersatz
EP4151175B1 (fr) Écarteur pour lèvres et joues, ainsi que système composé d'un scanner intrabuccal et d'un écarteur pour lèvres et joues
DE19627517C2 (de) Abformlöffel

Legal Events

Date Code Title Description
ENP Entry into the national phase

Ref country code: AU

Ref document number: 2000 13788

Kind code of ref document: A

Format of ref document f/p: F

AK Designated states

Kind code of ref document: A1

Designated state(s): AE AL AM AT AU AZ BA BB BG BR BY CA CH CN CR CU CZ DE DK DM EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT TZ UA UG US UZ VN YU ZA ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW SD SL SZ TZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
WWE Wipo information: entry into national phase

Ref document number: 1999971688

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 1999971688

Country of ref document: EP

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

WWG Wipo information: grant in national office

Ref document number: 1999971688

Country of ref document: EP